LITERATURE REVIEW OF LOWER BENUE TROUGH
Later, the deep layer of vegetation became buried under coarse sands. The detailed mapping includes the measurement of strikes and dip of the formation, azimuths of the fractures, descriptions of the rock unit and delineation of its contacts using lithologic difference; study of the rock type, sample collection and logging of the unit. Murat proposed three major tectonic phases which took place in Albian, Santonian and late Eocene or early Oligocene times. Regionally, the mapped area is within the Southern end of the Benue trough. These are mined in Enugu State.
Benue Trough is defined as an intercontinental cretaceous basin about km in length stretching in NE-SW direction and resting unconformably upon the Precambrian basement. The Coniacian is represented by the Awgu Formation Reyment, You are commenting using your Twitter account. Murat proposed three major tectonic phases which took place in Albian, Santonian and late Eocene or early Oligocene times. The Campano-Maastrichtian experienced the third sedimentary cycle in this trough. Published August 4,
Fill in your details below or click an icon to log in: Strike and dip of bed were measured and carefully plotted into the map with the aid of a protractor, ruler and pencil. Azimuth of the fractures was equally measured with their dip direction and dip amount. Email required Address never made public. Venue tectonic elements were active until the Miocene.
Simpsonand Reyment and Barber were of the view that the Asu River Group was deposited in a moderately deep water environment during the Albian, with abundant ammonites, foras, radiolarian, and pollens.
Contacts were delineated using lithologic difference. The Benue Trough is a unique rift feature on the African continent in that it occupies an intracontinental position and has a thick compressionally folded Cretaceous supracrustal fill Cratcheley and Jones ; Wright ; Grant ; Burke et al.
Literature review of lower benue trough – Google Docs
This movement gave rise to a main axial Abakaliki High that was asymmetrically disposed in the trough to give a wider western complimentary Anambra Syncline and a narrower eastern Afikpo Syncline. Published August 4, By continuing to use this website, you agree to their use.
The beds of this age are located in the Southeastern part of Nigeria, around Calabar. A middle Albian age was assigned to the group by Reyment on the basis of ammonites such as Oxytropidoceras hausa and Oxytropidoceras manuaniceras sp. You are commenting using your Google account. Location[ edit ] Sketch map revisw Benue Trough The trough has its southern limit at the northern boundary of the Niger Deltawhere it dips down and is overlaid with Tertiary and more recent sediments.
The formation consists of bluish grey, well bedded shales. Posted on August 8, by colbybernal The detailed mapping includes the measurement of strikes and dip of the formation, azimuths of the fractures, descriptions of the rock unit and delineation of its contacts using lithologic difference; litsrature of the rock type, sample collection and logging of the unit.
It consist of arkosic sandstones, limestones and alternating limestones and shales which became gradually more predominantly shally in its uppermost parts Reyment, The trough is characterized by an uplifted basement block, flanked by deep basin containing about 6km of sediments.
The mapping exercise was carried out with the help of the geological materials and equipments. Its litersture pile includes sandstone, siltstone, shale and limestone occurrences, Reyment The floor of the Basin is irregular and sediments thicknesses vary from place to place.
Helena in the Atlantic ocean. Geomorphologic features such as relief and drainage were noted. The Santonian age was heralded by a tectonic beenue.
An attempt is therefore made to assemble a review literaturs the known geology of the Benue Trough in general and for the Lower and Middle Benue Trough in particular, based on the few published papers and on oral discussions with geologists and geophysicists interested in the area.
Literature review of the lower benue trough
A minor transgression occurred in late Maastrichtian with the deposition of Nsukka formation. When separation was complete, the southern part of Africa swung back to some extent, with the sediments in the Benue Trough compressed and folded. The other two arms continued to spread during the break-up of Gondwanaas South America separated from Africa.
It started with the deposition of the Nkporo formation Nkporo shales. The second is found only in the south of the trough, and may belong to a period when the extension of the Atlantic had slowed down, ending with a period of compression. View all posts by beatricemciver It consist of dark shales and mudstone with occasional thin beds of sandy shales and sandstones.
Reyment described the litho and biostratigraphy of the Asu River Group with its type locality along Asu River. Previous The essay topic.